Trains, he said, are a part of the idiomatic sensibility in the United States, that???s why there developed the styles of the train-whistle guitar and train-whistle harmonica, which were extended, elaborated and refined into jazz compositions such as (for instance) Duke Ellington???s Daybreak Express" and Loco Madi and Count Basie???s 9:20 Special, all of which use railroad onomatopoeia throu